Accurate, reliable, and scalable measurement of classroom quality represent a critical tool for ensuring that young children benefit from early learning programs. The Early Childhood Classroom Observation (ECCO) study was designed to better understand how video recordings can support high-quality measurement of pre-kindergarten (pre-K) classrooms,…

This report summarizes findings from a two-year study of Chicago's Excellence in Teaching Pilot, which was designed to drive instructional improvement by providing teachers with evidence-based feedback on their strengths and weaknesses. The pilot consisted of training and support for principals and teachers, principal observations of teaching…

Classical test theory is based on the concept of a true score for each examinee, defined as the expected or average score across an infinite number of repeated parallel tests. In most cases, there is only a score from a single administration of the test in question. The difference between this single observed score and the underlying true score is…

This paper presents the results of ongoing analyses of the reliability of the System for Teaching and Learning Assessment and Review (STAR) as a comprehensive measure of classroom teaching and learning for making teacher certification decisions. Focus was on the effects of high stakes assessment conditions for certification on the generalizability…